ej.microvg

Class Path

java.lang.Object

ej.microvg.Path

public class Path
extends Object

Represents a geometric paths consisting of straight line segments, quadratic curves, and cubic curves.

Constructor Summary

Constructors

Constructor and Description
Path() Creates an empty path.

Method Summary

Modifier and Type	Method and Description
void	close() Closes the current contour.
void	cubicTo(float x1, float y1, float x2, float y2, float x3, float y3) Adds a cubic bezier from the last point, approaching control points (x1,y1) and (x2,y2), and ending at (x3,y3).
void	cubicToRelative(float dx1, float dy1, float dx2, float dy2, float dx3, float dy3) Same as cubicTo(float, float, float, float, float, float), but the coordinates are considered relative to the current point on this contour.
float	getBottomBound() Gets the bottom bound of this path.
float	getLeftBound() Gets the left bound of this path.
float	getRightBound() Gets the right bound of this path.
float	getTopBound() Gets the top bound of this path.
void	lineTo(float x, float y) Adds a line from the last point to the specified point (x,y).
void	lineToRelative(float dx, float dy) Same as lineTo(float, float), but the coordinates are considered relative to the last point on this contour.
void	moveTo(float x, float y) Sets the beginning of the next contour to the point (x,y).
void	moveToRelative(float dx, float dy) Sets the beginning of the next contour relative to the last point on the previous contour.
void	quadTo(float x1, float y1, float x2, float y2) Adds a quadratic bezier from the last point, approaching control point (x1,y1), and ending at (x2,y2).
void	quadToRelative(float dx1, float dy1, float dx2, float dy2) Same as quadTo(float, float, float, float), but the coordinates are considered relative to the last point on this contour.
void	reset() Resets the path to an empty one.
void	setOrigin(float dx, float dy) Sets the offset that will be applied to all the subsequent absolute points of the contour.

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Path

public Path()

Creates an empty path.

The origin is set to (0,0).

Method Detail

close

public void close()

Closes the current contour. If the current point is not equal to the first point of the contour, a line segment is automatically added.

cubicTo

public void cubicTo(float x1,
                    float y1,
                    float x2,
                    float y2,
                    float x3,
                    float y3)

Adds a cubic bezier from the last point, approaching control points (x1,y1) and (x2,y2), and ending at (x3,y3). If no moveTo(float, float) call has been made for this contour, the first point is automatically set to (0,0).

Parameters:

x1 - the x-coordinate of the 1st control point on a cubic curve

y1 - the y-coordinate of the 1st control point on a cubic curve

x2 - the x-coordinate of the 2nd control point on a cubic curve

y2 - the y-coordinate of the 2nd control point on a cubic curve

x3 - the x-coordinate of the end point on a cubic curve

y3 - the y-coordinate of the end point on a cubic curve

cubicToRelative

public void cubicToRelative(float dx1,
                            float dy1,
                            float dx2,
                            float dy2,
                            float dx3,
                            float dy3)

Same as cubicTo(float, float, float, float, float, float), but the coordinates are considered relative to the current point on this contour. If there is no previous point, then a moveTo(0,0) is inserted automatically.

Parameters:

dx1 - the x-coordinate of the 1st control point on a cubic curve

dy1 - the y-coordinate of the 1st control point on a cubic curve

dx2 - the x-coordinate of the 2nd control point on a cubic curve

dy2 - the y-coordinate of the 2nd control point on a cubic curve

dx3 - the x-coordinate of the end point on a cubic curve

dy3 - the y-coordinate of the end point on a cubic curve

getBottomBound

public float getBottomBound()

Gets the bottom bound of this path.

If this path does not contain any point, all bounds are equal to 0.

Returns:

the bottom bound of this path

getLeftBound

public float getLeftBound()

Gets the left bound of this path.

If this path does not contain any point, all bounds are equal to 0.

Returns:

the left bound of this path

getRightBound

public float getRightBound()

Gets the right bound of this path.

If this path does not contain any point, all bounds are equal to 0.

Returns:

the right bound of this path

getTopBound

public float getTopBound()

Gets the top bound of this path.

If this path does not contain any point, all bounds are equal to 0.

Returns:

the top bound of this path

lineTo

public void lineTo(float x,
                   float y)

Adds a line from the last point to the specified point (x,y). If no moveTo(float, float) call has been made for this contour, the first point is automatically set to (0,0).

Parameters:

x - the x-coordinate of the end of a line

y - the y-coordinate of the end of a line

lineToRelative

public void lineToRelative(float dx,
                           float dy)

Same as lineTo(float, float), but the coordinates are considered relative to the last point on this contour. If there is no previous point, then a moveTo(0,0) is inserted automatically.

Parameters:

dx - the amount to add to the x-coordinate of the previous point on this contour, to specify a line

dy - the amount to add to the y-coordinate of the previous point on this contour, to specify a line

moveTo

public void moveTo(float x,
                   float y)

Sets the beginning of the next contour to the point (x,y).

Parameters:

x - the x-coordinate of the start of a new contour

y - the y-coordinate of the start of a new contour

moveToRelative

public void moveToRelative(float dx,
                           float dy)

Sets the beginning of the next contour relative to the last point on the previous contour. If there is no previous contour, this is treated the same as moveTo(float, float).

Parameters:

dx - the amount to add to the x-coordinate of the end of the previous contour, to specify the start of a new contour

dy - the amount to add to the y-coordinate of the end of the previous contour, to specify the start of a new contour

quadTo

public void quadTo(float x1,
                   float y1,
                   float x2,
                   float y2)

Adds a quadratic bezier from the last point, approaching control point (x1,y1), and ending at (x2,y2). If no moveTo(float, float) call has been made for this contour, the first point is automatically set to (0,0).

Parameters:

x1 - the x-coordinate of the control point on a quadratic curve

y1 - the y-coordinate of the control point on a quadratic curve

x2 - the x-coordinate of the end point on a quadratic curve

y2 - the y-coordinate of the end point on a quadratic curve

quadToRelative

public void quadToRelative(float dx1,
                           float dy1,
                           float dx2,
                           float dy2)

Same as quadTo(float, float, float, float), but the coordinates are considered relative to the last point on this contour. If there is no previous point, then a moveTo(0,0) is inserted automatically.

Parameters:

dx1 - the amount to add to the x-coordinate of the last point on this contour, for the control point of a quadratic curve

dy1 - the amount to add to the y-coordinate of the last point on this contour, for the control point of a quadratic curve

dx2 - the amount to add to the x-coordinate of the last point on this contour, for the end point of a quadratic curve

dy2 - the amount to add to the y-coordinate of the last point on this contour, for the end point of a quadratic curve

reset

public void reset()

Resets the path to an empty one.

The origin is also reset to (0,0).

setOrigin

public void setOrigin(float dx,
                      float dy)

Sets the offset that will be applied to all the subsequent absolute points of the contour.

Parameters:

dx - the amount in the x direction to offset the subsequent points

dy - the amount in the y direction to offset the subsequent points